A new improved solution to reduce the shear stress interface of a steel beam strengthened with composite materials

This paper presents a novel approach to mitigate shear interface stress in steel beams reinforced with composite materials. The proposed solution is distinctive as it integrates shear strains from both the beam and the reinforcing plate, leading to improved accuracy in predicting critical interface stresses and the composite structure's overall behavior. The analysis is based on a parabolic shear stress distribution assumption across the thickness of both the steel beam and the bonded plate. A parametric analysis is conducted to explore various factors impacting the stability of the composite plate, acknowledging that interface stresses depend on the material and geometric properties of the reinforcement. The results show that parameter variations have a significant effect on maximum shear stresses within the composite material. Numerical findings substantiate the new solution's efficacy and elucidate key aspects of interfacial stress distributions. This research deepens the comprehension of mechanical interactions at the interface and supports the design process for composite-steel hybrid structures.